Glossary

R

ready reckoner

Any of various reckoning devices consisting of movable discs surmounted by or carrying other graduated or figured circles for calculating, for example, phases of the moon, the time of the rising or setting sun, or the times of the tides; usually made of paper, cardboard, or vellum and often found preprinted in or attached to manuscripts or books of the 13th to the 16th century.

rebate plane

Wood or metal plane which are flat across the sole, in which the cutting iron extends to the extreme edge on one or both sides; (SALAM) used to cut a rebates along the grain at the edge of the wood.

receipt

Written acknowledgment of the receiving or taking of goods or money delivered or paid.

record - document

Recorded information, regardless of medium, created, received, and maintained by an agency, institution, organization, or individual in pursuance of its legal obligations or in the transaction of business.

records

Recorded information, regardless of medium, created, received, and maintained by an agency, institution, organization, or individual in pursuance of its legal obligations or in the transaction of business. ICA.

rectal speculum

Instrument used to dilate the anus or rectum, and throwing light within, thus facilitating examination or surgical operations.

rectum

The last portion of the large intestine that communicates with the colon above and the anus below.

red blood cell

A blood cell that transports oxygen to the body cells. The most common form of blood cell in the human body, they are filled with haemoglobin, a molecule that binds well to oxygen.

reflex camera

A camera system which uses a mirror to reflect incoming image rays onto a ground glass scree, providing a system of viewing and viewing.

reflexology

A complementary practice based on the theory that reflex points in the feet are connected to the rest of the human body. Massage of these points is believed to unblock energy flows in the body that cause illness.

refractor head

Instrument providing means of positioning lenses, prisms and other optical devices in front of a subject's eyes for the purpose of determining refractive error and binocular functions

refreshment trolley

A hand cart carrying refreshments for sale to passengers, used on train or on station platforms.

refrigerator

Container or space maintained at a low temperature by means of ice or mechanical apparatus for the purpose of preserving its contents, especially food or drink

register

A book, ledger or other document in which records are kept.

registration plate

A plate, usually of cast metal, giving the date, registration number and name of the railway company with whom a private owner vehicle or locomotive has been registered.

regulations

Use broadly for principles, rules, or laws designed to control or regulate behavior of individuals, corporations, or other entities.

regulator clock

A pendulum clock or other type of clock which accurately keeps time, typically used to adjust the running other timepieces or to time astronomical observations (historical). For clocks physical adjusting slave dials or similar, use 'Master Clock'

regulator valve

The main steam control of a steam locomotive, used to admit steam from the boiler into the cylinders.

regulatory sign

Sign that is intended to regulate behavior, displaying such information as prohibitions or rules of order or conduct.

rehabilitative therapy

Therapy to improve a person's condition after illness or injury, prevent further loss of function, and maintain or improve quality of life.